[Xringer]

I'll check into cleaning that long squirrel cage fan this summer.
I'm thinking of removing the indoor unit's cover and pulling out the motor.
Maybe the motor can be replaced at a reasonable cost or just cleaned up and lubed.
If the hi-pitched noise isn't coming from the bearings, it's probably the coils acting like a speaker.
That might be fixable with an infusion of glue..

The reason for the dirt build-up is because of water mist inside the unit
during the summer. I've seen brownish water marks, where dirty water
dripped down on the exhaust slot. So, there is mist (sometimes) flying
around inside the fan area. (Water + pollen and dirt= brown cake).


When the spring comes, my 1st goal (If I get over this norovirus) is to find some cleaner for the outdoor coil..
I would never try to use our power washer on the outdoor unit..
To much power. It can turn hardwood decking into shredded pulp.